A natural reply, advancing the center and preventing it from being broken with e6-e5. The computer is not a big fan of this move.
14... c8a6  15. c3c4 It's important to avoid the exchange since the pair of bishops is precisely one of the reasons for White's advantage. 15... a5d2  16. e1d2 With the bishop pair and a powerful pawn center, there's no doubt about White's advantage, but perhaps it's not as big as it seems. In any case, Fedoseev is an almost unparalleled master at turning questionable positions into victories. 16... f8e8 Preparing the break on e5.